I have an 05 6MT that I have a few weird noises that are mind boggling me and I can't find where they are coming from and I'm also a mechanic and these noises are just stumping me if any help would be helpful I have the video links below

Only while pressing on gas https://www.tiktok.com/t/ZT81C1Lnw/

On start up while being a little cold from temp
https://www.tiktok.com/t/ZT81Q4W38/

Everytime i turn the car off this noise takes a while to sound but does it everytime
https://www.tiktok.com/t/ZT81QXPD6/

 

I don't hear anything unusual in the first clip. Maybe describe what you're hearing.

The second one sounds like belt and/or pulley noise. Might be the belt, might be one of the idler pulleys or the tensioner pulley. There are youtube videos for diagnosing a belt squeal that can be helpful. Could be as simple as belt tension. If your belt and idler pulleys are all old, you might want to change them just because they are a wear item that have finite lifetime. You can take your belts off and spin the pulleys by hand and see if you hear or feel them not spinning smoothly. You can run the car without the ac belt on to see if it's that pulley making the noise.

The third one is crazy. No idea. But interested to hear what you end up finding.

 

The first clip is there's a ticking noise coming from that I can't tell if that's egr or something and it only makes that ticking noise when pressing on gas
The second one is not a tensioner cause my car doesn't have a tensioner pulley it has idler pulleys that tighten up with a bolt on the bottom so I was hoping someone could tell me which pulley is screaming at me lol
The third one is only when its at temp and ran for at least 1 min and cut off it takes a total of 32sec for that sound to even start making noise after it's cut off

 

I just can't hear any ticking when you press the gas. Sounds about the same all through the video. One thing that's easy to try is the PCV valve. You can disconnect the vacuum line from the PCV (plug the line with your thumb while you have it disconnected). If the clicking stops, it's your PCV valve. I bought a cheap one from the auto parts store and it actually sounds like static electric discharge on mine when the valve moves up and down inside. I need to get an oem one. There are lots of other things that could be doing it and since I can't really hear it I have no idea. But checking the PCV is free and easy and will take you about 1 minute to either confirm or rule out as the cause. I don't think we have an EGR on these cars. I could be wrong but I don't ever recall them being discussed and have never had to work on one when fooling around with my intake.

Call it whatever you want but those pulleys that tighten with bolts are used to set the tension of your accessory belts so in my mind that's a tensioner. You also have a non-adjustable idler pulley on the alternator/power steering pump side unless somebody has deleted it which is common. It's a good time for you to do that idler delete if you end up changing belts and pulleys to sort out your noise. I'd be surprised if anybody can tell you over the internet exactly which pulley is making that noise or even if it's a pulley at all with absolute certainty. You have to do a little work to figure it out or you end up replacing the wrong part(s). You should check your belt tension and make sure it's in spec and tighten it with your idler pulley bolts if it's loose. It's free and easy and should be part of normal maintenance and may solve your problem. If it doesn't you can pull your belts off and check your pulley bearings and see if they feel like crap.

Good luck and let us know what you find.

 

First sound is a ticking sound coming from one cylinder. You can isolate which one it is with a mechanics stethoscope, I would probe around the header flange on each cylinder and find out which one is loudest. Also on the head around the valve cover but these damned plastic valve covers make it hard to isolate which one is loud.

Sound is likely either a loose spark plug, an exhaust leak, or MAYBE a lifter. It doesn't really sound like a lifter though, more of a SWISHING sound and less of a TAPPING sound. My guess is a loose sparkplug.

Second sound I hear two things, the constant low frequency groaning sound is probably the power steering pump, might be a touch low on fluid, might just be old fluid. Doesn't sound very important at the moment though, the higher pitch squealing type sound later in the video is definitely a pulley making noise though. I would take off both belts, spin those pulleys by hand. It's USUALLY the tensioners though so start there. They should have just a little bit of resistance when you spin it, should only make about 1-2 revolutions when you spin them hard, and should be perfectly silent. If there's ANY NOISE WHATSOEVER the bearings are shot, usually they will just free spin with no resistance whatsoever when they're shot and will make noise.

If it's not the tensioners then spin the other pulleys as well, they should all be very silent and smooth.

Sound three is some kind of pressure building up and being released. My guess is something with the coolant system, try removing the radiator cap, get it up to temp but not overflowing, then shut it off and see if the sound goes away. Possibly a bad check valve for the brake booster, if you feel around in the rubber line right before the brake booster you'll feel a hard spot in the line, there is a check valve inserted up into the hose. Also possibly refrigerant pressure normalizing inside the expansion valve, you could remove the AC belt, run the engine without the AC compressor spinning, then shut the car off and see if it makes that noise still.